Steam trap



FIG. 1 is a perspective view of a steam trap in accordance with our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The part of the figures in coarse dot patterns and outlined in dashed lines illustrates a portion that forms no part of the claimed design. 

The ornamental design for a steam trap, as shown and described. 